Hi

I recently upgraded my 390 to W10 from 7.  It is connected via HDMI. This worked for a while under 10 but suddenly stopped working. I have tried reverting back to old graphics drivers to no avail.  I am now having to use the VGA port

So hearing that my chipset might not be any good under 10 I bought a 2nd hand graphics card

HD6450 1GB - DVI-D / HDMI 

PN 299-2E164-810SA  - SKU#11190-02

This still did not get detected by the bios (which is A14) or W10, nothing

Then I read it could be down to my bios being in legacy mode. So I used some partition software to convert without data loss and switched bios over to UEFI - this had still not worked and is not detected. Even when I remove the existing Intel HD 2000.

I know the manual states this card is OK but it mentions the Display port version I think (not HDMI), I don't know if this would really make any difference?  I have reseated the card a few times to no avail.

Assuming the card is OK / compatible, is there anything else I have missed ?